VERMONT CDL AIR BRAKES PRACTICE TEST
21.
Which of the following is NOT TRUE? When you drive a tractor-trailer combination with ABS, you should:
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brake the same way, regardless of whether you have ABS on the tractor, the trailer, or both.
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monitor your tractor and trailer as you slow down, and if it is safe to do so, back off the brakes to stay in control.
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drive slower to keep your vehicle in a straight line.
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22.
The heavier the vehicle:
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the less work the brakes must do to stop it.
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the more work the brakes must do to stop it.
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the higher the center of gravity will be.
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23.
In some vehicles a modulating control valve may be used to:
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apply the front brakes.
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decrease the pressure in the brake system.
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apply the spring brakes gradually.
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24.
If you perform the skills test in a vehicle that is not equipped with air brakes:
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you will be required to operate vehicles with air brakes.
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you will be required to take the tank vehicle test.
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you will be restricted from operating vehicles with air brakes.
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25.
The air compressor is connected to:
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the transmission.
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the engine.
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the radiator.
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